1SS4. 1 Stkjnk(;kr oh lltr (i('7iiis Ac-anthis. I C cj 



at present engaged. The measurements are given separately for 

 the different sexes, and for the summer and winter plumages. In 

 the former the feathers are usually much abraded, the measure- 

 ments thus being smaller and also less reliable. It is consequently a 

 matter of fact that the measurements of summer specimens of the 

 larger form inosculate with those of the smaller one in winter 

 plumage ; but that is not true intergradation. vSuch specimens 

 only are therefore measured in which locality, date, and sex were 

 plainly marked on the label by the collector himself, unless other- 

 wise stated. In no case have I given measui'ements of examples the 

 sex or date of which I have guessed from the size, the color, or 

 the appearance of the plumage, except in two particular instances 

 as specified in the table. 



P. S. — Since tlie above was written Air. W. Brewster has had 

 the great kindness to send to me for inspection the specimens 

 upon which his remarks on X. JiolboeJIi in his above quoted 

 paper, w^ere based. Thev confirm what I have ahead}' said, and 

 there can, in my opinion, be no doubt that these Redpolls are 

 birds bred in Greenland, or perhaps on the opposite shore of North 

 America, wandering along the coast line in winter as far south 

 as New England and New York. Thev are. in all respects, true 

 and typical A. I. rostrata. 



As Mr. Brewster's and my measurements are scarcely com- 

 parable on account of ovu" different manner of making them, I 

 have remeasured them, so that they may be compared with the 

 dimensions recorded in the 'Table of Comparative Measure- 

 ments' of this paper. I have also added the dimensions of two 

 fine males in winter plumage from Dr. A. K. Fisher's collection, 

 being in every respect true rostrata. The character originallv 

 pointed out by Mr. Brewster, that in rostrata the upper mandi- 

 ble is decidedlv decurved and its outline noticeablv convex. 



